in octave repmat([],2,3) works well: ans = [](0x0) I guess in MATLAB too but numpy tile() can't handle it correctly:

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from numpy import * tile(array([1]), (2,3)) array([[1, 1, 1], [1, 1, 1]]) tile(array([]), (2,3)) Traceback (innermost last): File "<stdin>", line 1, in <module> File "/usr/lib/python2.5/site-packages/numpy/lib/shape_base.py", line 623, in tile c = c.reshape(-1,n).repeat(nrep,0) ValueError: total size of new array must be unchanged

(I have numpy 1.0.1) D.